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359be1c870
File operations always raise a ENOENT error when a file doesn't exist. Checking the file exists before the operation adds a race condition condition where the file could be removed between operations. As the operation already raises an error on a missing file, avoid this race and avoid checking the file exists twice. Instead only check a file exists by catching the ENOENT error.
78 lines
2 KiB
Python
78 lines
2 KiB
Python
import errno
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import os
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from datetime import datetime
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from django.conf import settings
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from django.contrib.staticfiles.storage import CachedStaticFilesStorage
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from django.core.files import storage
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from django.utils import timezone
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class DummyStorage(storage.Storage):
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"""
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A storage class that implements get_modified_time().
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"""
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def _save(self, name, content):
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return 'dummy'
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def delete(self, name):
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pass
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def exists(self, name):
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pass
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def get_modified_time(self, name):
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return datetime.datetime(1970, 1, 1, tzinfo=timezone.utc)
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class PathNotImplementedStorage(storage.Storage):
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def _save(self, name, content):
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return 'dummy'
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def _path(self, name):
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return os.path.join(settings.STATIC_ROOT, name)
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def exists(self, name):
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return os.path.exists(self._path(name))
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def listdir(self, path):
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path = self._path(path)
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directories, files = [], []
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for entry in os.listdir(path):
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if os.path.isdir(os.path.join(path, entry)):
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directories.append(entry)
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else:
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files.append(entry)
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return directories, files
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def delete(self, name):
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name = self._path(name)
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try:
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os.remove(name)
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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def path(self, name):
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raise NotImplementedError
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class SimpleCachedStaticFilesStorage(CachedStaticFilesStorage):
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def file_hash(self, name, content=None):
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return 'deploy12345'
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class ExtraPatternsCachedStaticFilesStorage(CachedStaticFilesStorage):
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"""
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A storage class to test pattern substitutions with more than one pattern
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entry. The added pattern rewrites strings like "url(...)" to JS_URL("...").
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"""
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patterns = tuple(CachedStaticFilesStorage.patterns) + (
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(
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"*.js", (
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(r"""(url\(['"]{0,1}\s*(.*?)["']{0,1}\))""", 'JS_URL("%s")'),
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),
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),
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)
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